Matter geometry coupling and Casimir wormhole geometry

Abstract

In this study, we investigate traversable wormhole solutions within the setup of $f(R,L_m)$ gravity, a modified theory of gravity where the gravitational action relies upon the matter Lagrangian $L_m$ and the Ricci scalar R. In General Relativity (GR), stability issue in traversable wormholes necessitates the existence of exotic matter violating the null energy condition (NEC). In contrast, we explore wormhole solutions that align with the criteria for Casimir wormholes. Our analysis demonstrates that in the context of $f(R,L_m)$ gravity, exotic matter can sustain these wormholes. We further examine the traversability conditions of the wormhole, considering both scenarios with and without the Generalized Uncertainty Principle (GUP) correction. Additionally, the stability of the wormhole is assessed based on equilibrium conditions. Our findings suggest that $f(R,L_m)$ gravity offers a viable framework for the existence of stable, traversable wormholes sustained by exotic matter, potentially expanding the landscape of viable wormhole solutions beyond the confines of GR.